/*************************************************************************
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 * 
 * Copyright 2000, 2010 Oracle and/or its affiliates.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * This file is part of OpenOffice.org.
 *
 * OpenOffice.org is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * OpenOffice.org is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenOffice.org.  If not, see
 * <http://www.openoffice.org/license.html>
 * for a copy of the LGPLv3 License.
 *
 ************************************************************************/

// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_tools.hxx"

#ifdef UNX
#include <errno.h>
#endif

#include <limits.h>
#include <string.h>

#include "comdep.hxx"
#include <tools/fsys.hxx>

/*************************************************************************
|*
|*    FileStat::FileStat()
|*
|*    Beschreibung      FSYS.SDW
|*    Ersterstellung    MI 11.06.91
|*    Letzte Aenderung  MI 11.06.91
|*
*************************************************************************/

FileStat::FileStat()
:	// don't use Default-Ctors!
	aDateCreated( sal_uIntPtr(0) ),
	aTimeCreated( sal_uIntPtr(0) ),
	aDateModified( sal_uIntPtr(0) ),
	aTimeModified( sal_uIntPtr(0) ),
	aDateAccessed( sal_uIntPtr(0) ),
	aTimeAccessed( sal_uIntPtr(0) )
{
    nSize = 0;
    nKindFlags = FSYS_KIND_UNKNOWN;
    nError = FSYS_ERR_OK;
}

/*************************************************************************
|*
|*    FileStat::FileStat()
|*
|*    Beschreibung      FSYS.SDW
|*    Ersterstellung    MI 11.06.91
|*    Letzte Aenderung  MI 11.06.91
|*
*************************************************************************/

FileStat::FileStat( const DirEntry& rDirEntry, FSysAccess nAccess )
:	// don't use Default-Ctors!
	aDateCreated( sal_uIntPtr(0) ),
	aTimeCreated( sal_uIntPtr(0) ),
	aDateModified( sal_uIntPtr(0) ),
	aTimeModified( sal_uIntPtr(0) ),
	aDateAccessed( sal_uIntPtr(0) ),
	aTimeAccessed( sal_uIntPtr(0) )
{
	sal_Bool bCached = FSYS_ACCESS_CACHED == (nAccess & FSYS_ACCESS_CACHED);
	sal_Bool bFloppy = FSYS_ACCESS_FLOPPY == (nAccess & FSYS_ACCESS_FLOPPY);

#ifdef FEAT_FSYS_DOUBLESPEED
	const FileStat *pStatFromDir = bCached ? rDirEntry.ImpGetStat() : 0;
	if ( pStatFromDir )
	{
		nError = pStatFromDir->nError;
    	nKindFlags = pStatFromDir->nKindFlags;
    	nSize = pStatFromDir->nSize;
    	aCreator = pStatFromDir->aCreator;
    	aType = pStatFromDir->aType;
		aDateCreated = pStatFromDir->aDateCreated;
    	aTimeCreated = pStatFromDir->aTimeCreated;
    	aDateModified = pStatFromDir->aDateModified;
    	aTimeModified = pStatFromDir->aTimeModified;
		aDateAccessed = pStatFromDir->aDateAccessed;
    	aTimeAccessed = pStatFromDir->aTimeAccessed;
	}
	else
#endif
    	Update( rDirEntry, bFloppy );
}

/*************************************************************************
|*
|*    FileStat::IsYounger()
|*
|*    Beschreibung      FSYS.SDW
|*    Ersterstellung    MA 11.11.91
|*    Letzte Aenderung  MA 11.11.91
|*
*************************************************************************/

// sal_True  wenn die Instanz j"unger als rIsOlder ist.
// sal_False wenn die Instanz "alter oder gleich alt wie rIsOlder ist.

sal_Bool FileStat::IsYounger( const FileStat& rIsOlder ) const
{
    if ( aDateModified > rIsOlder.aDateModified )
        return sal_True;
    if ( ( aDateModified == rIsOlder.aDateModified ) &&
         ( aTimeModified > rIsOlder.aTimeModified ) )
        return sal_True;

    return sal_False;
}

/*************************************************************************
|*
|*    FileStat::IsKind()
|*
|*    Ersterstellung    MA 11.11.91 (?)
|*    Letzte Aenderung  KH 16.01.95
|*
*************************************************************************/

sal_Bool FileStat::IsKind( DirEntryKind nKind ) const
{
    sal_Bool bRet = ( ( nKind == FSYS_KIND_UNKNOWN ) &&
				  ( nKindFlags == FSYS_KIND_UNKNOWN ) ) ||
           		( ( nKindFlags & nKind ) == nKind );
    return bRet;
}

/*************************************************************************
|*
|*    FileStat::HasReadOnlyFlag()
|*
|*    Ersterstellung    MI 06.03.97
|*    Letzte Aenderung  UT 01.07.98
|*
*************************************************************************/

sal_Bool FileStat::HasReadOnlyFlag()
{
#if defined WNT || defined UNX || defined OS2
	return sal_True;
#else
	return sal_False;
#endif
}

/*************************************************************************
|*
|*    FileStat::GetReadOnlyFlag()
|*
|*    Ersterstellung    MI 06.03.97
|*    Letzte Aenderung  UT 02.07.98
|*
*************************************************************************/

sal_Bool FileStat::GetReadOnlyFlag( const DirEntry &rEntry )
{

	ByteString aFPath(rEntry.GetFull(), osl_getThreadTextEncoding());
#if defined WNT
	DWORD nRes = GetFileAttributes( (LPCTSTR) aFPath.GetBuffer() );
	return ULONG_MAX != nRes &&
		   ( FILE_ATTRIBUTE_READONLY & nRes ) == FILE_ATTRIBUTE_READONLY;
#elif defined OS2
	FILESTATUS3 aFileStat;
	APIRET nRet = DosQueryPathInfo( (PSZ)aFPath.GetBuffer(), 1, &aFileStat, sizeof(aFileStat) );
	switch ( nRet )
	{
		case NO_ERROR:
			return FILE_READONLY == ( aFileStat.attrFile & FILE_READONLY );
		default:
			return sal_False;
	}
#elif defined UNX
	/* could we stat the object? */
	struct stat aBuf;
	if (stat(aFPath.GetBuffer(), &aBuf))
		return sal_False;
	/* jupp, is writable for user? */
	return((aBuf.st_mode & S_IWUSR) != S_IWUSR);
#else
	return sal_False;
#endif
}

/*************************************************************************
|*
|*    FileStat::SetReadOnlyFlag()
|*
|*    Ersterstellung    MI 06.03.97
|*    Letzte Aenderung  UT 01.07.98
|*
*************************************************************************/

sal_uIntPtr FileStat::SetReadOnlyFlag( const DirEntry &rEntry, sal_Bool bRO )
{

	ByteString aFPath(rEntry.GetFull(), osl_getThreadTextEncoding());

#if defined WNT
	DWORD nRes = GetFileAttributes( (LPCTSTR) aFPath.GetBuffer() );
	if ( ULONG_MAX != nRes )
		nRes = SetFileAttributes( (LPCTSTR) aFPath.GetBuffer(),
					( nRes & ~FILE_ATTRIBUTE_READONLY ) |
					( bRO ? FILE_ATTRIBUTE_READONLY : 0 ) );
	return ( ULONG_MAX == nRes ) ? ERRCODE_IO_UNKNOWN : 0;
#elif defined OS2
	FILESTATUS3 aFileStat;
	APIRET nRet = DosQueryPathInfo( (PSZ)aFPath.GetBuffer(), 1, &aFileStat, sizeof(aFileStat) );
	if ( !nRet )
	{
		aFileStat.attrFile = ( aFileStat.attrFile & ~FILE_READONLY ) |
							 ( bRO ? FILE_READONLY : 0 );
		nRet = DosSetPathInfo( (PSZ)aFPath.GetBuffer(), 1, &aFileStat, sizeof(aFileStat), 0 );
	}
	switch ( nRet )
	{
		case NO_ERROR:
			return ERRCODE_NONE;

		case ERROR_SHARING_VIOLATION:
			return ERRCODE_IO_LOCKVIOLATION;

		default:
			return ERRCODE_IO_NOTEXISTS;
	}
#elif defined UNX
	/* first, stat the object to get permissions */
	struct stat aBuf;
	if (stat(aFPath.GetBuffer(), &aBuf))
		return ERRCODE_IO_NOTEXISTS;
	/* set or clear write bit for user */
	mode_t nMode;
	if (bRO)
    {
		nMode = aBuf.st_mode & ~S_IWUSR;
		nMode = aBuf.st_mode & ~S_IWGRP;
		nMode = aBuf.st_mode & ~S_IWOTH;
    }
	else
		nMode = aBuf.st_mode | S_IWUSR;
	/* change it on fs */
	if (chmod(aFPath.GetBuffer(), nMode))
	{
		switch (errno)
		{
			case EPERM :
			case EROFS :
				return ERRCODE_IO_ACCESSDENIED;
			default    :
				return ERRCODE_IO_NOTEXISTS;
		}
	}
	else
		return ERRCODE_NONE;
#else
	return ERRCODE_IO_NOTSUPPORTED;
#endif
}

/*************************************************************************
|*
|*    FileStat::SetDateTime
|*
|*    Ersterstellung	PB  27.06.97
|*    Letzte Aenderung
|*
*************************************************************************/
#if defined WNT || defined OS2

void FileStat::SetDateTime( const String& rFileName,
							const DateTime& rNewDateTime )
{
	ByteString aFileName(rFileName, osl_getThreadTextEncoding());

	Date aNewDate = rNewDateTime;
	Time aNewTime = rNewDateTime;

#if defined WNT
	TIME_ZONE_INFORMATION aTZI;
	DWORD dwTZI = GetTimeZoneInformation( &aTZI );

	if ( dwTZI != (DWORD)-1 && dwTZI != TIME_ZONE_ID_UNKNOWN )
	{
		// 1. Korrektur der Zeitzone
		LONG nDiff = aTZI.Bias;
		Time aOldTime = aNewTime; // alte Zeit merken

		// 2. evt. Korrektur Sommer-/Winterzeit
		if ( dwTZI == TIME_ZONE_ID_DAYLIGHT )
			nDiff += aTZI.DaylightBias;

		Time aDiff( abs( nDiff / 60 /*Min -> Std*/ ), 0 );

		if ( nDiff > 0 )
		{
			aNewTime += aDiff;					// Stundenkorrektur

			// bei "Uberlauf korrigieren
			if ( aNewTime >= Time( 24, 0 ) )
				aNewTime -= Time( 24, 0 );

			// Tages"uberlauf?
			if ( aOldTime == Time( 0, 0 ) ||	// 00:00 -> 01:00
				 aNewTime < aOldTime ) 			// 23:00 -> 00:00 | 01:00 ...
				aNewDate++;
		}
		else if ( nDiff < 0 )
		{
			aNewTime -= aDiff;					// Stundenkorrektur

			// negative Zeit (-1:00) korrigieren: 23:00
			if (aNewTime < Time( 0, 0 ) )
				aNewTime += Time( 24, 0 );

			// Tagesunterlauf ?
			if ( aOldTime == Time( 0, 0 ) ||	// 00:00 -> 23:00
				 aNewTime > aOldTime )			// 01:00 -> 23:00 | 22:00 ...
				aNewDate--;
		}
	}


	SYSTEMTIME aTime;
	aTime.wYear = aNewDate.GetYear();
	aTime.wMonth = aNewDate.GetMonth();
	aTime.wDayOfWeek = 0;
	aTime.wDay = aNewDate.GetDay();
	aTime.wHour = aNewTime.GetHour();
	aTime.wMinute = aNewTime.GetMin();
	aTime.wSecond = aNewTime.GetSec();
	aTime.wMilliseconds = 0;
	FILETIME aFileTime;
	SystemTimeToFileTime( &aTime, &aFileTime );

	HANDLE hFile = CreateFile( aFileName.GetBuffer(), GENERIC_WRITE, 0, 0,
							   OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0 );

	if ( hFile != INVALID_HANDLE_VALUE )
	{
		SetFileTime( hFile, &aFileTime, &aFileTime, &aFileTime );
		CloseHandle( hFile );
	}
#elif defined OS2

	// open file
	ULONG nAction = FILE_EXISTED;
	HFILE hFile = 0;
	ULONG nFlags = OPEN_FLAGS_WRITE_THROUGH	|
				   OPEN_FLAGS_FAIL_ON_ERROR	| OPEN_FLAGS_NO_CACHE	|
				   OPEN_FLAGS_RANDOM		| OPEN_FLAGS_NOINHERIT	|
				   OPEN_SHARE_DENYNONE		| OPEN_ACCESS_READWRITE;

	APIRET nRet = DosOpen((PSZ)aFileName.GetBuffer(), &hFile, (PULONG)&nAction,
						  0/*size*/, FILE_NORMAL,
						  OPEN_ACTION_FAIL_IF_NEW | OPEN_ACTION_OPEN_IF_EXISTS,
						  nFlags, 0/*ea*/);

	if ( nRet == 0 )
	{
	    FILESTATUS3 FileInfoBuffer;

	    nRet = DosQueryFileInfo(
			hFile, 1, &FileInfoBuffer, sizeof(FileInfoBuffer));

	    if ( nRet == 0 )
	    {
	        FDATE aNewDate;
	        FTIME aNewTime;

	         // create date and time words
	        aNewDate.day     = rNewDateTime.GetDay();
	        aNewDate.month   = rNewDateTime.GetMonth();
	        aNewDate.year    = rNewDateTime.GetYear() - 1980;
	        aNewTime.twosecs = rNewDateTime.GetSec() / 2;
	        aNewTime.minutes = rNewDateTime.GetMin();
	        aNewTime.hours   = rNewDateTime.GetHour();

	        // set file date and time
	        FileInfoBuffer.fdateCreation   = aNewDate;
	        FileInfoBuffer.ftimeCreation   = aNewTime;
	        FileInfoBuffer.fdateLastAccess = aNewDate;
	        FileInfoBuffer.ftimeLastAccess = aNewTime;
	        FileInfoBuffer.fdateLastWrite  = aNewDate;
	        FileInfoBuffer.ftimeLastWrite  = aNewTime;

	        DosSetFileInfo(hFile, 1, &FileInfoBuffer, sizeof(FileInfoBuffer));
	    }
	    DosClose(hFile);
	}
#endif

}
#endif